Previously _send_text() caught all exceptions (except Exception) when
sending HTML-formatted messages, falling back to plain text even for
network errors like TimedOut and NetworkError. This caused connection
demand to double during pool exhaustion scenarios (3 retries × 2
fallback attempts = 6 calls per message instead of 3).
Now only catches BadRequest (HTML parse errors), letting network errors
propagate immediately to the retry layer where they belong.
Fixes: HKUDS/nanobot#3050
Fixes#2856
Previously __version__ was hardcoded as '0.4.1' in __init__.py while
pyproject.toml declared version '0.1.5'. This caused nanobot gateway to
report version 0.4.1 on startup while pip showed 0.1.5.
Now __version__ reads from importlib.metadata.version('nanobot-ai'),
keeping pyproject.toml as the single source of truth.
On Windows, certain Unicode input (emoji, mixed-script text, surrogate
pairs) causes prompt_toolkit's FileHistory to crash with
UnicodeEncodeError when writing the history file.
Fix: wrap FileHistory with a _SafeFileHistory subclass that sanitizes
surrogate characters before writing, replacing invalid sequences instead
of crashing.
Fixes#2846
The pydantic to_camel function generates 'e2EeEnabled' (treating 'ee'
as a word boundary) for the field 'e2ee_enabled'. Users writing
'e2eeEnabled' in their config get the default value instead.
Fix: add explicit alias='e2eeEnabled' to override the incorrect
auto-generated alias. Both 'e2eeEnabled' and 'e2ee_enabled' now work.
Fixes#2851
bahtyaandXubin Ren